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| • Services |
Save time, manpower, and headaches. Our factory trained service technicians will keep your air compressor operating at optimum condition.
NM&E offers a comprehensive range of service and support options in addition to our extensive product range.
• Scheduled Maintenance & Support Programs
• System Design & Turn Key Installation
• Energy Efficiency Surveys
• Custom Fabrication & Equipment Start-ups
• Air Compressor Restoration
• Equipment Training & Predictive Maintenance
• Oil Analysis & Leak Detection |
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National Marketing and Engineering is a one-stop shop for all your compressed air system evaluation needs. Our knowledge and expertise spans the full range of makes and models of compressed air systems and components. You can count on NM&E to provide an objective analysis of your compressed air system based on sound, technical facts, and to offer solutions that typically require a much lower capital investment by you.
What's more is the amount of energy savings our customers experience as a result of our services. The yield returned per dollar on air costs following the first analysis is the largest of any type of energy savings achievable. Most of our customers are amazed at the extent of the problems our air system audits uncover, how completely we can solve them, and how much can be saved on electric and other associated costs.
If your air systems maintenance costs are going up and up on you every year and you would like a price comparison to identify savings, please contact us today.
National Marketing & Engineering is Intelligent Air Technology. |
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• Compressed Air Explained
Piston
The piston compressor is one of the earliest compressor designs, but it remains the most versatile and is still a very efficient compressor. The piston compressor moves a piston forward in a cylinder via a connecting rod and crankshaft. If only one side of the piston is used for compression, it is described as single acting. If both sides of the piston, top and underside are employed, it is double acting.
The versatility of the piston compressors knows virtually no limits. It compresses both air and gases with very little alterations. The piston compressor is the only design capable of compressing air and gas to high pressures, such as breathing air applications.
The configuration of a piston compressor can be a single cylinder for low pressure/low volume to a multi-stage configuration cable of compressing to very high pressure. In these compressors, air is compressed in stages, increasing the pressure before entering into the next stage to compress the air into even higher pressure.
Rotary Screw
The screw compressor is a displacement compressor with pistons in a screw format; this is the predominant compressor type in use today. The screw compression element main parts comprise male and female rotors that move towards each other while the volume between them and the housing decreases. The pressure ratio of a screw is dependent on the length and profile of the screw and of the form of the discharge port.
The screw element is not equipped with any valves and there are no mechanical forces to create any imbalance. It can therefore work at high shaft speed and combine a large flow rate with small exterior dimensions.
Rotary Vane
Based on traditional, tried and tested technology, the vane compressor is directly driven at very low speed (1450rpm), offering unrivalled reliability. The rotor, the only continually moving part, has a number of slots machined along its length into which fit sliding vanes that ride on a film of oil.
The rotor rotates within a cylindrical stator. During rotation, centrifugal force extends the vanes from their slots, forming individual compression cells. Rotation decreases the cell volume, increasing the air pressure. The heat generated by compression is controlled by pressurised oil injection. The high pressure air is discharged through the outlet port with the remaining traces of oil removed by the final oil separator. |
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